My Dell keyboard has 2 USB ports where I connect the mouse to.
The keyboard itself is USB. I use that connector to hook up one PC at a time as needed.
Each PC (except the Sun Ultra) has USB ports in front, conveniently, to connect my keyboard.
Yes, I agree, a switcher would be best. Last time I checked, switcher is unjustifiably not worth it for me.
I use Dell LCD monitors as well because some models have 2 USB ports on the side and 2 in the back.
They are powered USB ports, so I never have any problems. Just ask Hunter. I think he uses Dells as well.
Cooler Master HAF 922 blue case
AMD Athlon 64 X2 6000+ 3.0ghz (it's old, but looks like people liked it http://www.newegg.com/Product/Product.aspx?Item=N82E16819103773)
Gigabyte mini board (don't know the model off-hand - came bundled with the processor)
4gb Kingston DDR2 "Extreme" RAM
Antec Neopower blue 650w PSU
Maxtor SATA II 150gb hdd (7200 rpm)
Seagate IDE 150gb hdd (7200 rpm)
HIS (AMD) 6950 factory OC
Asus 24" LCD/LED VS248H-P